✔ Correct Answer: B. 1939
The correct answer to the question “When was helicopter developed?” is 1939. This question belongs to General Knowledge. Practice the related questions below to master this topic for your FPSC, PPSC and NTS tests.
The correct answer to the question “When was helicopter developed?” is 1939. This question belongs to General Knowledge. Practice the related questions below to master this topic for your FPSC, PPSC and NTS tests.